Adjustment means for stretch reduction rolling mills

Details Adjustment means for stretch reduction rolling mills Adjustment means for stretch reduction rolling mills

1979-12-11

1982-04-06

Ruggiero, Joseph F.

Boots, shoes, and leggings

72 12, 72 16, 72 17, 364472, G06F 1546, B21B 3700

Patent

active

043239714

ABSTRACT:
An adjustment device is provided for regulating the total degree of drawing in a multi-stand stretch reduction rolling mill for the stretch reduction of tube having a digital unit which calculates intermittently the desired or theoretical stretchings (.lambda. theor.) from the entering and exiting wall thicknesses (S.sub.o, S) and the external diameters (D.sub.o,D) of both the actual entering and desired finished tube sections and continuously the actual stretchings (.lambda. act.) from the entrance and exit speeds (V.sub.o,V) of the tube, and a regulator adjusting the roll r.p.m.'s as a function of the differences in theoretical and actual stretchings (.DELTA..lambda.).

REFERENCES:
patent: 3074300 (1963-01-01), Justus
patent: 3766761 (1973-10-01), Adair et al.
patent: 3874211 (1975-04-01), Hayashi
patent: 4002048 (1977-01-01), Pozsgay
patent: 4086800 (1978-05-01), Demny et al.

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